This is very cool. You can, for example, start with Seattle, then compare how much it costs to fly out of Seattle, then restrict only to nonstops if you like. I discovered that it's very cheap to fly to Los Angeles, pretty much the same as flying anywhere else in the Western US from Seattle, and that it's the same price to fly to anywhere on the east coast from Seattle as it is to go to New York or Hawaii. Very fun tool for investigating high level information about flying out of a city, I'll be using this a lot now.